It is designed to invert 12 VDC to 120 VAC. It is 88% efficient with 2 AC outlet. Measures 9.68 inch length x 5.76 inch width x 2.58 inch height. Features low input voltage warning alarm, short circuit, ground fault, over loading and reverse polarity protection. AC power is available from a NEMA-20R GFCI duplex outlet on the front panel.